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Practice Areas

Marnix is a noted specialist in cross-border litigation and international arbitration. His work His work encompasses energy, distribution, technology, electronics, IT, rail and air transport, insurance, investment, projects, construction and M&A disputes. Marnix's experience includes a wide variety of high stakes international disputes, commercial and investor state arbitrations, as well as complex enforcement and setting aside disputes.


As of 1 January 2020, Marnix has taken the role as Managing Partner of De Brauw.

Partner since 2005.

Professional Memberships

Marnix is co-chair of the ICC Commission’s Task Force on Emergency Arbitration.

Marnix was the Dutch member of the ICC International Court of Arbitration from 2006-2015, and has been Vice-President of the Court since 2015.

He is an active member of the ICC Institute of World Business Law, the ICC Commission on Arbitration, of ICCA and of the IBA Arbitration Committee.


He is a co-author of "Arbitration in the Netherlands" (Kluwer, 2019) and a frequent author for Global Arbitration Review (GAR). He is also editor and co-author of "A Guide to the NAI Arbitration Rules: including commentary on Dutch Arbitration Law" (Kluwer International, 2009).


Marnix frequently teaches, lectures and publishes on cross-border litigation and arbitration related topics.